Preparation of terbium doped carbon dots and their antibacterial capacity against Escherichia coli

doi:10.3969/j.issn.1004-1524.2020.02.13

›› 2020, Vol. 32 ›› Issue (2): 291-298.DOI: 10.3969/j.issn.1004-1524.2020.02.13

• Environmental Science • Previous Articles Next Articles

Preparation of terbium doped carbon dots and their antibacterial capacity against Escherichia coli

LI Hong¹, TIAN Hao¹, YU Lijuan¹, GAO Zhe², YANG Yaling², LI Wanyi^1,*

1. Institute of Agro-Products Processing, Yunnan Academy of Agricultural Sciences, Kunming 650221;
2. Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming 650500, China

Received:2019-09-02 Online:2020-02-25 Published:2020-03-13

Abstract

Abstract: In this study, carbon dots were synthesized by one-step hydrothermal method using potato as raw material, and Tb-doped carbon dots (Tb-CDs) were prepared by surface modification of carbon dots with rare metal terbium. The Tb-CDs were characterized by scanning transmission electron microscope, ultraviolet spectrum, infrared spectrum, and fluorescence spectrum, and the antibacterial effect of the Tb-CDs against Escherichia coli was explored, along with the feasibility of fluorescence label of E. coli by Tb-CDs. It was showed that the prepared Tb-CDs had small uniform particle size, good dispersibility and strong fluorescence. Due to the rich carboxyl groups and hydroxyl groups in the surface, the Tb-CDs had good water solubility. The Tb-CDs had good antibacterial activity against E. coli under photocatalytic conditions. When the concentration of Tb-CDs was 0.6 mg·mL^-1, the antibacteria rate against E. coli could reach 100% under 60 min of irradiation. Besides, the prepared Tb-CDs could effectively label E. coli with fluorescence.

Key words: carbon dots, terbium, fluorescence label, photocatalysis, antibacteria

CLC Number:

O611.4

LI Hong, TIAN Hao, YU Lijuan, GAO Zhe, YANG Yaling, LI Wanyi. Preparation of terbium doped carbon dots and their antibacterial capacity against Escherichia coli[J]. , 2020, 32(2): 291-298.

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Preparation of terbium doped carbon dots and their antibacterial capacity against Escherichia coli

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